Kidde 21026042 User manual

Combination

Smoke and

Carbon Monoxide

Alarm

Manual P/N 820-1417 Rev. C 2505-7231-01

For questions concerning your Smoke and Carbon Monoxide

Alarm, please call our Consumer Hotline at 1-800-880-6788.

User’s Guide for Model KN-COSMXTR-B

• Nuisance Alarm Reduction

• Advanced Ion Fire

Detection

• Battery Operated

• 2-LED Display

• Hush

®

• Peak Level Memory

For your convenience, write down the following information. If you call

our consumer hotline, these are the first questions you will be asked:

Alarm Model Number

(located on back of the alarm):

Date of Manufacture

(located on back of the alarm):

Date of Purchase:

Where Purchased:

ATTENTION: Please take a few minutes to thoroughly read this user’s

guide which should be saved for future reference and passed on to any

subsequent owner.

Introduction............................... 1

Product View.............................. 2

Features .................................. 4

Operating/Installation Instructions

Step 1: Installing Batteries ................... 8

Step 2: Installation Instructions:

A. Recommended Installation Locations....... 9

B. Where Not to Install ................... 12

C. How to Install ........................ 13

D. Tamper Resist Feature .................. 15

Step 3: Testing the Alarm ................... 16

Step 4: Hush

®

Control Feature ................ 17

Step 5: Peak Level Memory .................. 17

What to do if the Alarm Sounds

Smoke Alarm............................. 18

Carbon Monoxide Alarm .................... 20

Alarm Response Times ...................... 21

Battery Replacement ....................... 21

General Alarm Maintenance ................. 22

Carbon Monoxide Safety Information

General CO Information .................... 23

Possible Sources........................... 23

CO Safety Tips............................ 24

Symptoms of CO Poisoning .................. 24

Fire Safety Information

Escape Plan .............................. 25

Fire Prevention............................ 26

Industry Safety Standards

National Fire Protection Association ............ 27

California State Fire Marshall ................. 27

Consumer Product Safety Commission ......... 28

NRC.................................... 28

Warranty and Service Information ............ 29

Table of Contents

Thank you for purchasing the Kidde Combination Smoke and

Carbon Monoxide Alarm model KN-COSMXTR-B. This alarm

has a seven-year limited warranty. Please take a few minutes

to thoroughly read this user’s guide, and save for future

reference. Teach children how to respond to the alarms, and

that they should never play with the unit.

Your Kidde Smoke/CO Alarm was designed to detect

both smoke and carbon monoxide from any source

of combustion in a residential environment. It is not

designed for use in a recreational vehicle (RV) or boat.

If you have any questions about the operation or installation

of your alarm, please call our toll free Consumer Hotline

at 1-800-880-6788. The guide on page 26 will help you

determine the correct location of safety products that will

help keep your home a safer place.

1

Introduction

FRONT

Test/Reset/Hush

Button

Red LED

(Light Emitting Diode)

Green LED

(Light Emitting Diode)

Alarm Sounder

2

Product View

BACK

Battery Chamber

Battery Placement

3

2

1

INST ALL

THIRD

INST ALL

SECOND

INST ALL

FIRST

W ARNING:

BA TTERIES

HA VE BEEN

REMOVED

AA Battery

AA

Battery

Product View

 • Permanentindependentsmokeandcarbonmonoxide

sensors.

 • Smoke alarm takes precedence when both smoke

and carbon monoxide are present.

 • Alarm/Voicemessagewarningsystemthatalertsyouof

the following conditions in the manner described

below, thus eliminating any confusion over which

alarm is sounding:

– FIRE: The alarm/voice pattern is three long alarm

beeps followed by the verbal warning message

“FIRE! FIRE!”. This pattern is repeated until the

smoke is eliminated. The red LED light will flash

while in alarm/voice mode.

– CARBON MONOXIDE: The alarm/voice pattern is

four short alarm beeps followed by the verbal

warning message “WARNING! CARBON

MONOXIDE!”. After four minutes the alarm/voice

pattern will sound once every minute until the

unit is reset, or the CO eliminated. The red LED

light will flash while in alarm/voice mode.

– LOW BATTERY: When the batteries are low and

need replacing the red LED light will flash and the

unit will “chirp” one time, followed by the warning

message “LOW BATTERY”. This cycle will occur once

every minute for the first hour. After the first hour

the red LED light will continue to flash every minute

accompanied by the “chirp” only sound. The voice

message “LOW BATTERY” will sound once every

fifteen minutes during the “chirp” only cycle.

This will continue for at least seven days.

 • One“chirp”every30secondsisanindicationthat

the alarm is malfunctioning. If this occurs call the

Consumer Hotline at 1-800-880-6788.

 • After seven (7) years of cumulative power up, this unit

will “chirp” twice every 30 seconds. This is an “opera-

tional end of life” feature which will indicate that it is time

to replace the alarm.

4

Features

• Loud85decibelalarm

 • Nuisancealarmreduction

 • Advancedionfiredetection

 • Oversizedtestbuttonforeasyactivation

 • Testbuttonperformsthefollowingfunctions:

– Tests the units electronics and verifies proper unit

operation

– Resets the unit during CO alarm

– Peak Level Memory (see page 16)

– Activates or Cancels Hush

®

Feature (see page 16)

 • Mountingbracketdesignedforeasyorientation

of the unit

 • GreenandredLEDlightsthatindicatenormal 

operation and alarm status

– Green Light: The green LED light flashes every 30

seconds to indicate the unit is operating properly

and once every 2 seconds to indicate the unit is in

HUSH

®

mode. The green light also flashes before a

CO reading is taken and when any button is

pressed.

– Red Light: When a dangerous level of smoke or

carbon monoxide is detected the red LED light will

flash and the corresponding alarm pattern

(depending on the source) will sound. If the unit

malfunctions, the red LED light will flash and the

unit will chirp every 30 seconds indicating a system

problem.

 • Poweredbythree(3)AAbatteries

 • Batterylockoutsystemthatprohibitsinstallation

without using three batteries

 • TamperResistFeaturethatdeterschildrenandothers

from removing the alarm

5

Features

Smoke Alarm

The smoke alarm monitors the air for products of combustion

that are produced when something is burning or smoldering.

When smoke particles in the smoke sensor reach a specified

concentration, the alarm/voice message warning system will

sound, and be accompanied by the flashing red LED light.

The smoke alarm takes precedence when both smoke

and carbon monoxide are present.

NFPA 72 states: Life safety from fire in residential occupancies

is based primarily on early notification to occupants of the

need to escape, followed by the appropriate egress actions

by those occupants. Fire warning systems for dwelling units

are capable of protecting about half of the occupants in

potentiallyfatalfires.Victimsareoftenintimatewiththefire,

too old or young, or physically or mentally impaired such that

they cannot escape even when warned early enough that

escape should be possible. For these people, other strategies

such as protection-in-place or assisted escape or rescue are

necessary.

 •Smokealarms are devices that can provide early warn

ing of possible fires at a reasonable cost; however,

  alarmshavesensinglimitations.Ionizationsensing

alarms may detect invisible fire particles (associated

with fast flaming fires) sooner than photoelectric

alarms. Photoelectric sensing alarms may detect visible

fire particles (associated with slow smoldering fires)

  soonerthanionizationalarms.Homefiresdevelopin

different ways and are often unpredictable. For

maximum protection, Kidde recommends that both

  IonizationandPhotoelectricalarmsbeinstalled.

 •Abatterypoweredalarmmusthaveabatteryofthe

specified type, in good condition and installed properly.

 •ACpoweredalarms(withoutbatterybackup)willnot

operate if the AC power has been cut off, such as by

an electrical fire or an open fuse.

 •Smokealarms must be tested regularly to make sure

the batteries and the alarm circuits are in good

operating condition.

6

Smoke Alarm Features

 •Smokealarmscannotprovideanalarmifsmokedoes

not reach the alarm. Therefore, smoke alarms may not

sense fires starting in chimneys, walls, on roofs, on the

other side of a closed door or on a different floor.

 •Ifthealarmislocatedoutsidethebedroomorona

different floor, it may not wake up a sound sleeper.

 •Theuseofalcoholordrugsmayalsoimpairone’s

ability to hear the smoke alarm. For maximum

protection, a smoke alarm should be installed in each

sleeping area on every level of a home.

 •Althoughsmokealarmscanhelpsavelivesby 

providing an early warning of a fire, they are not a

substitute for an insurance policy. Home owners and

renters should have adequate insurance to protect their

lives and property.

Carbon Monoxide (CO) Alarm

The carbon monoxide (CO) alarm monitors the air for the

presence of CO. It will alarm when there are high levels

of CO present, and when there are low levels of CO

present over a longer period of time. When a CO condition

matches either of these situations, the alarm/voice message

warning system will sound, and be accompanied by the

flashing red LED light. The carbon monoxide sensor uses an

electrochemical technology.

CAUTION: This alarm will only indicate the presence of

carbon monoxide gas at the sensor. Carbon monoxide

gas may be present in other areas.

Individuals with medical problems may consider using

warning devices which provide audible and visual signals for

carbon monoxide concentrations under 30 ppm.

7

Carbon Monoxide Alarm Features

Step 1: Installing Batteries

Batteries were not installed at the factory and must

be installed for the unit to operate! Install the three (3)

AA batteries in the back of the Smoke/CO Alarm.

 •Themountingplatemustberemovedfromthebackof

the unit to install batteries. To remove, hold the

mounting plate and twist counterclockwise (left).

 •

The battery polarity markings

on the bottom of the battery

compartment must be adhered to.

 •Batteriesmustbeinstalledinthe

sequence shown. If the batteries

seem difficult to install, they’re

not being installed in the proper

sequence.

 •Smoke/COAlarmwillnotengagetobracketunless

all three batteries are installed. Removal of any or all

batteries will render the Smoke/CO Alarm inoperative!

 •Afterthebatteriesarecorrectlyinstalledtheunit

will beep once and the red LED light will flash. After

20-30 seconds the green LED light will flash indicating

the unit is now operational.

CAUTION: Your Smoke/CO Alarm is sealed and the

cover is NOT removable!

Operating and Installation Instructions

8

Batteries Must Be Installed in Order Shown Below:

Install

First

Install

Second

Install

Last

3

2

1

INST ALL

THIRD

INST ALL

SECOND

INST ALL

FIRST

W ARNING:

BA TTERIES

HA VE BEEN

REMOVED

AA Battery

AA

Battery

3

2

1

Step 2: Installation Instructions

IMPORTANT: THIS ALARM MUST BE MOUNTED ON A

CEILING OR WALL. IT WAS NOT DESIGNED FOR USE

AS A TABLETOP DEVICE! INSTALL ONLY AS DETAILED!

A. Recommended Installation Locations:

Kidde recommends the installation of a Smoke/CO Alarm

in the following locations. For maximum protection we

suggest an alarm be installed on each level of a multilevel

home, including every bedroom, hallways, finished attics

and basements. Put alarms at both ends of bedroom,

hallway or large room if hallway or room is more than

30 ft. (9.1m) long. If you have only one alarm, ensure it is

placed in the hallway outside of the main sleeping area, or

in the main bedroom. Verify the alarm can be heard in all

sleeping areas.

Locate an alarm in every room where someone sleeps with

the door closed. The closed door may prevent an alarm not

located in that room from waking the sleeper. Smoke, heat

and combustion products rise to the ceiling and spread

horizontally.Mountingthealarmontheceilinginthecenter

of the room places it closest to all points in the room. Ceiling

mounting is preferred in ordinary residential construction.

When mounting an alarm on the ceiling, locate it at a

minimum of 4” (10cm) from the side wall (see diagram

A). If installing the alarm on the wall, use an inside wall

with the top edge of the alarm at a minimum of 4” (10cm)

and a maximum of 12” (30.5cm) below the ceiling (see

Diagram A).

Operating and Installation Instructions

9

Sloped Ceiling Installation:

The following information is from the National Fire Protection

Association and is listed in Fire Code 72. Install Smoke Alarms

on sloped, peaked or cathedral ceilings at, or within 3 ft

(0.9m)ofthehighestpoint(measuredhorizontally).NFPA72

states “Smoke alarms in rooms with ceiling slopes greater

than1ftto8ft(.3m-2.4m)horizontallyshallbelocatedon

the high side of the room”. NFPA 72 states “A row of alarms

shall be spaced and located within 3 ft (0.9 m) of the peak of

theceilingmeasuredhorizontally”(Seefigure2).

10

FIGURE 1

Operating and Installation Instructions

Mobile Homes:

Modern mobile homes have been designed and built to be

energy efficient. Install Smoke/CO alarms as recommended

above (refer to Recommended Installation Instructions and

figure 1). In older mobile homes that are not well insulated,

extreme heat or cold can be transferred from the outside

to the inside through poorly insulated walls and roof. This

may cause a thermal barrier, which can prevent smoke from

reaching an alarm mounted on the ceiling. In such mobile

homes install your Smoke/CO Alarm on an inside wall with

the top edge of the alarm at a minimum of 4 inches (10cm)

and a maximum of 12 inches (30.5cm) below the ceiling

(See figure 1). If you are not sure about the insulation in

your mobile home, or if you notice that the outer walls and

ceiling are either hot or cold, install your alarm on an inside

wall ONLY!

THIS EQUIPMENT SHOULD BE INSTALLED IN

ACCORDANCE WITH THE NATIONAL FIRE PROTECTION

ASSOCIATION’S STANDARD 72 (National Fire Protection

Association, Batterymarch Park, Quincy, MA 02269).

11

FIGURE 2

Operating and Installation Instructions

B. Where Not to Install:

Do not install in garages, kitchens, furnace rooms or

bathrooms! INSTALL AT LEAST 5 FEET AWAY FROM

ANY FUEL BURNING APPLIANCE.

Do not install within 3 ft (.9m) of the following: The door

to a kitchen, or a bathroom that contains a tub or shower,

forced air supply ducts used for heating or cooling, ceiling or

whole house ventilating fans, or other high air flow areas.

Avoid excessively dusty, dirty or greasy areas. Dust, grease or

household chemicals can contaminate the alarm’s sensors,

causing it to not operate properly.

Place the alarm where drapes or other objects will not block

the sensors. Smoke and CO must be able to reach the sensors

to accurately detect these conditions. Do not install in peaks

of vaulted ceilings, “A” frame ceilings or gabled roofs (see

diagram A). Keep out of damp and humid areas.

12

WARNING - This product is intended

for use in ordinary indoor locations of

family living units. It is not designed to

measure compliance with Occupational

Safety and Health Administration (OSHA)

commercial or industrial standards.

!

Operating and Installation Instructions

Install at least one (1) foot away from fluorescent lights,

electronic noise may cause nuisance alarms. Do not place

in direct sunlight and keep out of insect infested areas.

Extreme temperatures will effect the sensitivity of the Smoke/

CO Alarm. Do not install in areas where the temperature

is colder than 40 degrees Fahrenheit (4.4 Celsius) or hotter

than 100 degrees Fahrenheit (37.8 Celsius), such as garages

and unfinished attics. Do not install in areas where the

relative humidity (RH) is above 85%. Place away from doors

and windows that open to the outside.

Smoke alarms are not to be used with detector guards unless

the combination (alarm and guard) has been evaluated and

found suitable for that purpose.

C. How to Install:

To help identify the date to replace the unit, a label has been

affixed to the side of the alarm. Write the “Replace by”

date (7 years from initial power up) in permanent marker

on the label. See Alarm Replacement section for additional

information.

Remove mounting plate from the back of the unit by holding

the rim of the mounting plate and twisting counterclockwise

(left). See Diagram C. Hold the mounting plate against the

selected installation location (wall or ceiling) and mark the

center of the holes with a pencil.

13

Install

Remove

Mounting

Plate

DIAGRAM C

Operating and Installation Instructions

Drill a hole through the pencil

marks and use the enclosed

screws and anchors (see

diagram E) to secure (use 3/16”

drill bit for anchor holes). Align

the Smoke/CO Alarm with the

mounting plate and rotate

clockwise (right) until the unit

is aligned. Screw and anchor

accessories are supplied.

To ensure aesthetic alignment of the alarm with the hallway

or wall, the “A” line on the mounting plate should be parallel

withthehallwaywhenceilingmounting,orhorizontalwhen

wall mounting. See Diagram D.

14

Two labels are included with your alarm. They have important

information on what to do in case of an alarm. Add the

phone number of your emergency provider (Fire Department

or 911) in the space provided. Place one label next to the

alarm after it is mounted, and one label near a fresh air

source such as a door or window.

DIAGRAM D

DIAGRAM E

Operating and Installation Instructions

D. Tamper Resist Feature:

To make your smoke alarm tamper resistant, a tamper

resist feature has been provided. Activate the tamper resist

feature by breaking off the four posts in the square holes

in the trim ring (see figure A). When the posts are broken

off, the tamper resist tab on the base is allowed to engage

the mounting bracket. Rotate the alarm onto the mounting

bracket until you hear the tamper resist tab snap into place,

locking the alarm on the mounting bracket. Using the

tamper resist feature will help deter children and others

from removing the alarm from bracket. NOTE: To remove the

alarm when the tamper resist tab is engaged, press down on

the tamper resist tab, and rotate the alarm off of the bracket

(see figure B).

15

FIGURE A

FIGURE B

A

Posts

Operating and Installation Instructions

Step 3: Testing the Alarm

The test button has four purposes. It tests the unit’s elec-

tronics, resets the alarm, activates the Hush® feature, and

activates the peak level memory.

CAUTION: Due to the loudness (85 decibels) of the

alarm, always stand an arms length away from the

unit when testing.

• To test: Press and release the test/reset button and a

series of beeps will sound, followed by the message

“Fire! Fire!”, then another two series of beeps and the

message “Warning! Carbon Monoxide”, followed by 4

additional short beeps.

• Reset: If the Smoke/CO Alarm is sounding a CO alarm,

pressing the test/reset button will silence the alarm. If the

CO condition that caused the alert continues, the alarm

will reactivate. Reactivation times depend on the amount

of CO present. See page 21.

• Hush

®

: If the Smoke/CO Alarm is sounding a Smoke

alarm, pressing the test/reset button will temporarily

silence the alarm. If the smoke level continues to build,

the alarm will reactivate. See Step 4: Hush

®

Control

Feature.

• Peak Level Memory: If the green LED is blinking once

every16seconds,theunithasdetectedahazardous

condition. If the unit has detected a CO level of 100

PPM or greater, pushing the Test/Reset button will result

in a voice message “Caution, carbon monoxide previ-

ously detected”. Peak level also happens if the unit

detects smoke and then comes out of alarm. However,

there is no voice message if the unit is in peak level due

to smoke. When the Test/Reset button is pushed, the

unit exhibits a normal PTT if in peak level due to smoke.

Weekly testing is required! If at anytime it does not

perform as described, verify the three batteries are i nstalled

correctly and that they don’t need replacing. Clean dust and

other buildup off the unit. If it still doesn’t operate properly

call the Consumer Hotline at 1-800-880-6788.

16

Operating and Installation Instructions

Step 4: Hush

®

Control Feature

The Hush

®

featurehasthecapabilityoftemporarilydesensitizing

the smoke alarm circuit for approximately 10 minutes. This

feature is to be used only when a known alarm condition,

such as smoke from cooking, activates the alarm. You can put

your Smoke/CO Alarm in Hush

®

mode by pushing the test/

reset button. The unit will give a voice message “Hush mode

activated.” If the smoke is not too dense, the alarm will silence

immediately and the green LED light will flash every 2 seconds

for approximately 10 minutes. This indicates that the smoke

alarmisinatemporarilydesensitizedcondition.YourSmoke/CO

Alarm will automatically reset after approximately 10 minutes.

When the unit returns to normal operation after being in Hush

®

mode the alarm will sound if smoke is still present. The Hush

®

feature can be used repeatedly until the air has been cleared

of the condition causing the alarm. While the unit is in Hush

®

mode, pushing the test/reset button on the alarm will also end

the Hush

®

period. The unit will give a voice message “Hush

mode cancelled.”

NOTE: DENSE SMOKE WILL OVERRIDE THE HUSH

®

CONTROL FEATURE AND SOUND A CONTINUOUS ALARM.

CAUTION: BEFORE USING THE ALARM HUSH

®

FEATURE,

IDENTIFY THE SOURCE OF THE SMOKE AND BE CERTAIN

A SAFE CONDITION EXISTS.

Step 5: Peak Level Memory

If the green LED is blinking once every 16 seconds, the unit has

detectedahazardouscondition.IftheCOsensorhasdetecteda

CO level of 100 PPM or higher since last reset, it will be recorded

by the Peak Level Memory function. To access the Peak Level

Memory press the test/reset button. If a reading of 100 PPM

or higher has been recorded the unit will give a voice message

“Caution, Carbon Monoxide previously detected.” If you’ve

been away from home this feature allows you to check if there

was a CO reading of 100 PPM, or higher, during your absence.

Pushing the test/reset button resets the memory. It’s also reset

when the batteries are removed. There is no voice message

associated with peak level due to smoke. When the test/reset

button is pushed, the unit exhibits a normal PTT if the peak level

is due to smoke.

17

Operating and Installation Instructions

NEVER IGNORE THE SOUND OF THE ALARM!

Determining what type of alarm has sounded is easy

with your Kidde Combination Smoke/CO Alarm. The voice

message warning system will inform you of the type of

situation occurring. Refer to the Features section on page 4

for a detailed description of each alarm pattern.

When the smoke alarm sounds:

Smoke alarms are designed to minimize false alarms.

Cigarette smoke will not normally set off the alarm, unless

the smoke is blown directly into the alarm. This unit contains

advanced technology designed to reduce nuisance alarms,

such as from cooking particles. However, large quantities

of combustible particles from spills or broiling could still

cause the unit to alarm. Careful location of the unit away

from the kitchen area will give the maximum nuisance alarm

protection. Combustion particles from cooking may set off

the alarm if located too close to the cooking area. Large

quantities of combustible particles are generated from spills

or when broiling. Using the fan on a range hood which vents

to the outside (non- recirculating type) will also help remove

these combustible products from the kitchen.

If the alarm sounds, check for fires first. If a fire is discovered

follow these steps. Become thoroughly familiar with these

items, and review with all family members!

 •Alertsmallchildreninthehome.Childrensleepvery

sound and may not be awakened by the sound of the

smoke alarms.

 • Leaveimmediatelyusingoneofyourplannedescape

routes (see page 25). Every second counts, don’t stop

to get dressed or pick up valuables.

 • Beforeopeninginsidedoorslookforsmokeseepingin

around the edges, and feel with the back of your hand

If the door is hot use your second exit. If you feel it’s

safe, open the door very slowly and be prepared to

close immediately if smoke and heat rush in.

 • Iftheescaperouterequiresyoutogothroughsmoke,

crawl low under the smoke where the air is clearer.

18

What To Do When The Alarm Sounds!

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